At what point do you regret leaving someone?

You dated a good guy for half a year or so. He really treated you great, but he made some mistakes in the relationship and ultimately caused it to end. He was well liked by family and friends and everyone saw how much you meant to him.

Do you regret leaving him when a rebound doesn't work?

Do you regret leaving him when you mature and see what you had?

Or do you never regret leaving him?

At what point do you regret leaving someone?
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